CN210387890U

CN210387890U - Anti-backfire device of oxygen lance

Info

Publication number: CN210387890U
Application number: CN201921518056.0U
Authority: CN
Inventors: 单潇辰; 孟庆杰
Original assignee: Shandong Iron and Steel Co Ltd
Current assignee: Shandong Iron and Steel Co Ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-04-24
Anticipated expiration: 2029-09-12

Abstract

The utility model relates to an oxygen lance backfire-proof device, including the dabber of seting up the axial through-hole, the dabber includes the path section and the path section that extends forward from the preceding terminal surface of path section, the external diameter of path section is less than the external diameter of path section, and the preceding terminal surface rigid coupling of path section is equipped with the cover and locates the outlying tight cover that rises of path section, sets up two at least tight seams that rise that run through to preceding terminal surface on the lateral wall of tight cover that rises, and the outer disc of path section has the cover to locate the outlying lock sleeve that rises through threaded connection, and lock sleeve front end internal diameter is less than the tight cover front end external diameter that rises. The utility model compresses the expansion sleeve through the locking sleeve, compresses the oxygen lance through the reducing deformation of the expansion sleeve, not only realizes the sealing between the oxygen lance and the mandrel, but also facilitates the replacement of the oxygen lance; through set up the ball valve on extension pipe, can close the oxygen passageway when oxygen tempering fast, improve the security of using.

Description

Anti-backfire device of oxygen lance

Technical Field

The utility model relates to an oxygen suppliment pipeline field especially involves an oxygen lance anti-backfire device.

Background

The oxygen lance is the device commonly used that the metal smelting enterprise used, and relevant operations such as mainly used steel-tapping hole oxygen burning, scrap steel cutting, bale eye burning, traditional oxygen lance and oxygen supply pipe way are connected and are adopted sticky tape and oxygen lance ligature's mode usually, perhaps adopt rubber class device to seal, because of oxygen lance tip always has the burr, very easily cause the oxygen lance to damage, and the security performance is poor, and it is lower to change oxygen lance efficiency simultaneously.

Disclosure of Invention

The utility model provides an oxygen lance backfire arrester to the not enough of prior art, has avoided the oxygen supply pipe to be damaged, the convenient change to the oxygen lance moreover.

The utility model discloses a following technical scheme realizes, provides an oxygen lance backfire-proof device, including the dabber of seting up the axial through-hole, the dabber includes the path section and the path section that extends forward from the preceding terminal surface of path section, the external diameter of path section is less than the external diameter of path section, and the preceding terminal surface rigid coupling of path section is equipped with the cover and locates the outlying tight cover that rises of path section, sets up two at least tight seams that rise that run through to preceding terminal surface on the tight lateral wall of the cover that rises, and the outer disc of path section has the cover to locate the outer lock sleeve that rises through threaded connection and rises to establish the cover outlying, and the lock sleeve front end internal diameter is less than the tight cover front end external diameter that rises.

When the oxygen blowing pipe clamping device is used, the rear end of the through hole of the mandrel is communicated with the oxygen supply pipeline, the oxygen blowing pipe is sleeved between the small-diameter section of the mandrel and the tensioning sleeve, the locking sleeve is screwed on the middle-diameter section, due to the arrangement of the tensioning seam, the front end of the locking sleeve extrudes the tensioning sleeve, so that the oxygen blowing pipe is compressed, the oxygen blowing pipe and the mandrel are sealed and fixed, when the oxygen blowing pipe needs to be replaced, the locking sleeve is screwed off, the pressing force of the tensioning sleeve is lost, and the oxygen blowing pipe can be quickly pulled out of the mandrel.

And optimally, the front end surface of the middle-diameter section is in transitional connection with the outer circular surface of the small-diameter section through an inclined surface. This optimization scheme utilizes the direction on inclined plane through setting up the inclined plane, makes the oxygen lance tip take place to expand outward and warp, inseparabler and inclined plane laminating to make the sealed effect between oxygen lance and the dabber better.

As optimization, the mandrel also comprises an extension pipe fixedly connected to the rear end of the middle-diameter section, a ball valve is mounted on the extension pipe, and an inner hole of the extension pipe is communicated with the through hole in the mandrel. This optimization scheme has increased the distance that supplies oxygen pipe and lance outlet through setting up the extension pipe, conveniently operates more safely, through setting up the ball valve, when oxygen tempering appears, can avoid oxygen to continue the tempering fast through closing the ball valve, has improved the security of using.

And as optimization, the rear end of the ball valve is communicated with a screw head connected with an oxygen supply rubber pipe. This optimization scheme has made things convenient for the intercommunication of ball valve and oxygen suppliment rubber tube through setting up the silk head.

Preferably, the mandrel further comprises a large-diameter section extending backwards from the rear end face of the middle-diameter section, and the outer diameter of the large-diameter section is larger than that of the middle-diameter section. This optimization scheme is through setting up big footpath end, and convenient increase dabber rear end's wall thickness guarantees use intensity.

Preferably, the diameter of the through hole in the large-diameter section is larger than that of the through hole in the small-diameter section. The setting of this optimization scheme for oxygen has certain acceleration when big latus rectum gets into little latus rectum, has improved the oxygen blowing effect.

The utility model has the advantages that: the expansion sleeve is pressed through the locking sleeve, and the oxygen lance is pressed through the reducing deformation of the expansion sleeve, so that the sealing between the oxygen lance and the mandrel is realized, and the replacement of the oxygen lance is convenient; through set up the ball valve on extension pipe, can close the oxygen passageway when oxygen tempering fast, improve the security of using.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a mandrel configuration;

FIG. 3 is a view taken along line A of FIG. 2;

FIG. 4 is a schematic view of the structure of the tension sleeve;

FIG. 5 is a schematic view of the locking sleeve structure;

shown in the figure:

1. the device comprises an extension pipe, 2, a mandrel, 21, a small-diameter section, 22, a medium-diameter section, 23, a large-diameter section, 3, a tensioning sleeve, 4 and a locking sleeve.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

As shown in fig. 1, the anti-backfire device for the oxygen lance comprises a mandrel 2 provided with an axial through hole, wherein the mandrel comprises a middle diameter section 22, a small diameter section 21 extending forwards from the front end surface of the middle diameter section, and a large diameter section 23 extending backwards from the rear end surface of the middle diameter section, the outer diameter of the small diameter section is smaller than that of the middle diameter section, the outer diameter of the large diameter section is larger than that of the middle diameter section, and the diameter of the through hole in the large diameter section is larger than that of the through hole in the small diameter section.

The front end face of the middle-diameter section is fixedly connected with a tensioning sleeve 3 which is sleeved on the periphery of the small-diameter section, two tensioning seams which are uniformly distributed along the circumferential direction and penetrate through the side wall of the tensioning sleeve 3 are formed in the side wall of the tensioning sleeve, an insertion cavity with the radial size smaller than the wall thickness of the oxygen blowing pipe by 0.5-1 mm is formed between the tensioning sleeve and the small-diameter section, when the oxygen blowing pipe is inserted into the insertion cavity, the front end of the tensioning sleeve has certain pre-tightening force for the oxygen blowing pipe, but the deformation is small, and the insertion of the oxygen blowing pipe is not influenced. The expansion sleeve is reinforced by linear cutting, the width of the expansion joint is 2mm, and the oxygen lance can be inserted conveniently.

The outer disc of the intermediate diameter section is connected with a locking sleeve 4 which is sleeved on the periphery of the tensioning sleeve through threads, the locking sleeve 4 comprises a straight cylinder section connected with the intermediate diameter section through threads and a conical cylinder section extending forwards from the straight cylinder section, the inner diameter of the front end of the conical cylinder section is smaller than the inner diameter of the straight cylinder section, and the inner diameter of the front end of the conical cylinder section is smaller than the outer diameter of the front end of the tensioning sleeve. The excircle face of lock sleeve sets up the annular knurl, is convenient for manually increase the moment of torsion.

The front end face of the medium-diameter section is in transitional connection with the outer circular face of the small-diameter section through an inclined face, and the included angle between the inclined face and the small-diameter end is 13-15 degrees.

The ball valve is characterized by further comprising an extension pipe 1 fixedly connected to the rear end of the middle-diameter section, a ball valve is mounted on the extension pipe, and an inner hole of the extension pipe is communicated with a through hole in the mandrel. The rear end of the ball valve is communicated with a screw head connected with an oxygen supply rubber tube. One end of the screw head is provided with a thread matched with the ball valve, the other end of the screw head is provided with an agnail matched with the oxygen supply rubber tube, and the screw head is internally provided with an air vent.

In the use process, the special oxygen rubber tube for supplying oxygen is connected with the screw head, the joint is fixed and further sealed through the special oxygen rubber belt, the oxygen blowing tube is sleeved between the mandrel and the tensioning sleeve, the locking sleeve is screwed up manually, the end part of the oxygen blowing tube is sealed by utilizing the clamping force between the mandrel and the tensioning sleeve, and when oxygen tempering occurs, the ball valve is closed quickly, so that the tempering is avoided. Each part adopts stainless steel material, can not cause high temperature burn, and the oxygen lance is bayonet hookup simultaneously, can realize oxygen lance quick replacement, has improved the security and the operating efficiency of oxygen lance operation.

Of course, the above description is not limited to the above examples, and technical features of the present invention that are not described in the present application may be implemented by or using the prior art, and are not described herein again; the above embodiments and drawings are only used for illustrating the technical solutions of the present invention and are not intended to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments, and those skilled in the art should understand that changes, modifications, additions or substitutions made by those skilled in the art within the spirit of the present invention should also belong to the protection scope of the claims of the present invention.

Claims

1. The utility model provides an oxygen lance backfire-proof device which characterized in that: the mandrel comprises a mandrel (2) provided with an axial through hole, the mandrel comprises a middle-diameter section (22) and a small-diameter section (21) extending forwards from the front end face of the middle-diameter section, the outer diameter of the small-diameter section is smaller than that of the middle-diameter section, a tensioning sleeve (3) which is arranged on the periphery of the small-diameter section in a sleeved mode is fixedly connected to the front end face of the middle-diameter section, at least two tensioning seams which penetrate through the front end face are formed in the side wall of the tensioning sleeve (3), a locking sleeve (4) which is arranged on the periphery of the tensioning sleeve in a sleeved mode is connected to the outer circular face of the middle-diameter section through threads, and the inner diameter of the front end of the.

2. The oxygen lance backfire arrester as claimed in claim 1, wherein: the front end surface of the middle diameter section is in transition connection with the outer circular surface of the small diameter section through an inclined surface.

3. The oxygen lance backfire arrester as claimed in claim 1, wherein: the ball valve is characterized by further comprising an extension pipe (1) fixedly connected to the rear end of the middle-diameter section, a ball valve is mounted on the extension pipe, and an inner hole of the extension pipe is communicated with a through hole in the mandrel.

4. The oxygen lance backfire arrester as claimed in claim 3, wherein: the rear end of the ball valve is communicated with a screw head connected with an oxygen supply rubber tube.

5. The oxygen lance backfire arrester as claimed in claim 1, wherein: the mandrel further comprises a large-diameter section (23) extending backwards from the rear end face of the middle-diameter section, and the outer diameter of the large-diameter section is larger than that of the middle-diameter section.

6. The oxygen lance backfire arrester as claimed in claim 5, wherein: the diameter of the through hole in the large-diameter section is larger than that of the through hole in the small-diameter section.